Q.1 Solve any five of the following
1. Write all the factors of the given numbers and list their common factors
(1) 12, 16 (2) 21, 24 (3) 25, 30 (4) 24, 25 (5) 56, 72
2. Two ropes, one 8 metres long and the other 12 metres long are to be cut into pieces of the same length What will the maximum possible length of each piece be?
3. At the Rice Research Centre at Tumsar, there are 2610 kg of seeds of the basmati variety and 1980 kg of the Indrayani variety If the maximum possible weight of seeds has to be filled to make bags of equal weight what should be the weight of each bag ? How many bags of each variety will there be?
4. Veena has some beads She wants to make necklaces with an equal number of beads in each If she makes necklaces of 16 or 24 or 40 beads, there is no bead left over What is the least number of beads with her?
5. Find out the LCM of the following numbers
(1) 9, 15 (2) 2, 3, 5 (3) 12, 28 (4) 15, 20 (5) 8, 11
6. On the playground, if the children are made to stand for drill either 20 to a row or 25 to a row, all rows are complete and no child is left out What is the lowest possible number of children in that school?
